Any DCS World keys purchased from other sources are invalid and are simply trying to re-sell keys that are bound to other users or purchased through fraud. Such sites include Kinguin, CDExpress and G2A.

If you purchase DCS World keys from these sites, we cannot help you. We suggest you contact these sites for a refund.

Well, Nevada update 2.1 and Normandy release in only one day? no, i think not....

I think yes.

My understanding is 2.1 will be an update to the existing 2.0 install which will bring Normandy and graphics enhancements. It's just like any update that brings a new module with it, except this is a very big update, which is why they're incrementing to 2.1.